Global Patent Index - EP 3486491 A1

EP 3486491 A1 20190522 - PUMP FOR A FLUID

Title (en)

PUMP FOR A FLUID

Title (de)

PUMPE FÜR EIN FLUID

Title (fr)

POMPE POUR UN FLUIDE

Publication

EP 3486491 A1 20190522 (EN)

Application

EP 18200678 A 20181016

Priority

EP 17202569 A 20171120

Abstract (en)

The present invention relates to a pump (10) for fluids. The pump comprising: a pump housing (11); a power source (8); a drive shaft (6) connected to the power source (8) and extending along an axis A; a fluid inlet (14); a first impeller (22) rotated by said drive shaft and comprising a first impeller inlet (221) in fluid connection with the fluid inlet, and a first impeller outlet; a second impeller (23) rotated by said drive and comprising a second impeller inlet (231) in fluid connection with the first impeller outlet, and a second impeller outlet; and a sealing element (30) stationary arranged in relation to the drive shaft and first and second impeller, said sealing element is sleeve shaped and arranged between the first and second impeller around the drive shaft, said sealing element has a first end (32) transvers to the drive shaft and facing the first impeller and a second end (33) transverse to the drive shaft facing the second impeller, said sealing element has a length along axis A smaller than the distance between the first and second impeller such that the sealing element is movable along axis A between the first and second impeller, wherein the first end (32) of the sealing element has a first area (35) transverse to axis A and the second end (33) has a second area (36) transverse to axis A, and said first area is larger than said second area such that the force exerted by the lower pressure generated by the first impeller and the first area is substantially equal to the force exerted by the higher pressure generated by the second impeller and the second area.

IPC 8 full level

F04D 1/06 (2006.01); F04D 29/08 (2006.01)

CPC (source: EP US)

F04D 1/06 (2013.01 - EP US); F04D 7/04 (2013.01 - US); F04D 29/086 (2013.01 - EP US); F04D 29/126 (2013.01 - US); F04D 29/708 (2013.01 - US); F04D 13/06 (2013.01 - US)

Citation (search report)

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

Designated extension state (EPC)

BA ME

DOCDB simple family (publication)

EP 3486491 A1 20190522; EP 3486491 B1 20200930; AU 2018253629 A1 20190606; AU 2018253629 B2 20240613; BR 102018072777 A2 20190604; BR 102018072777 B1 20220614; CN 109812421 A 20190528; CN 109812421 B 20211221; ES 2824772 T3 20210513; US 10670033 B2 20200602; US 2019154051 A1 20190523; ZA 201807346 B 20190828

DOCDB simple family (application)

EP 18200678 A 20181016; AU 2018253629 A 20181026; BR 102018072777 A 20181106; CN 201811312708 A 20181106; ES 18200678 T 20181016; US 201816175068 A 20181030; ZA 201807346 A 20181102